Cannot Resolve Symbol @+id/ in .xml when using android:below_

Question

I try to add a button into my layout. The layout previously does not contain any errors. But after I drag and drop the button into the layout, it shows an error as the picture below.

Even I already define @+id/checksensortextview .

Here is the code before and after I add the button. (Even I remove the added button, the errors still there).

I add the button in activity_evaluate.xml, but it affect every .xml file except activity_login.xml

Is anybody face the problem like this before?
Thank you for any solutions and suggestions.

Answer 1

Invalidate Caches and Restart cleared that error for me.